Commit 99b27e3b authored by Matan Barak's avatar Matan Barak Committed by Doug Ledford

IB/cache: Add ib_find_gid_by_filter cache API

GID cache API users might want to search for GIDs with specific
attributes rather than just specifying GID, net device and port.
This is used in a later patch, where we find the sgid index by
L2 Ethernet attributes.
Signed-off-by: default avatarMatan Barak <matanb@mellanox.com>
Reviewed-By: default avatarDevesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent abae1b71
......@@ -440,6 +440,81 @@ int ib_find_cached_gid_by_port(struct ib_device *ib_dev,
}
EXPORT_SYMBOL(ib_find_cached_gid_by_port);
/**
* ib_find_gid_by_filter - Returns the GID table index where a specified
* GID value occurs
* @device: The device to query.
* @gid: The GID value to search for.
* @port_num: The port number of the device where the GID value could be
* searched.
* @filter: The filter function is executed on any matching GID in the table.
* If the filter function returns true, the corresponding index is returned,
* otherwise, we continue searching the GID table. It's guaranteed that
* while filter is executed, ndev field is valid and the structure won't
* change. filter is executed in an atomic context. filter must not be NULL.
* @index: The index into the cached GID table where the GID was found. This
* parameter may be NULL.
*
* ib_cache_gid_find_by_filter() searches for the specified GID value
* of which the filter function returns true in the port's GID table.
* This function is only supported on RoCE ports.
*
*/
static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev,
const union ib_gid *gid,
u8 port,
bool (*filter)(const union ib_gid *,
const struct ib_gid_attr *,
void *),
void *context,
u16 *index)
{
struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
struct ib_gid_table *table;
unsigned int i;
bool found = false;
if (!ports_table)
return -EOPNOTSUPP;
if (port < rdma_start_port(ib_dev) ||
port > rdma_end_port(ib_dev) ||
!rdma_protocol_roce(ib_dev, port))
return -EPROTONOSUPPORT;
table = ports_table[port - rdma_start_port(ib_dev)];
for (i = 0; i < table->sz; i++) {
struct ib_gid_attr attr;
unsigned long flags;
read_lock_irqsave(&table->data_vec[i].lock, flags);
if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID)
goto next;
if (memcmp(gid, &table->data_vec[i].gid, sizeof(*gid)))
goto next;
memcpy(&attr, &table->data_vec[i].attr, sizeof(attr));
if (filter(gid, &attr, context))
found = true;
next:
read_unlock_irqrestore(&table->data_vec[i].lock, flags);
if (found)
break;
}
if (!found)
return -ENOENT;
if (index)
*index = i;
return 0;
}
static struct ib_gid_table *alloc_gid_table(int sz)
{
unsigned int i;
......@@ -670,6 +745,24 @@ int ib_find_cached_gid(struct ib_device *device,
}
EXPORT_SYMBOL(ib_find_cached_gid);
int ib_find_gid_by_filter(struct ib_device *device,
const union ib_gid *gid,
u8 port_num,
bool (*filter)(const union ib_gid *gid,
const struct ib_gid_attr *,
void *),
void *context, u16 *index)
{
/* Only RoCE GID table supports filter function */
if (!rdma_cap_roce_gid_table(device, port_num) && filter)
return -EPROTONOSUPPORT;
return ib_cache_gid_find_by_filter(device, gid,
port_num, filter,
context, index);
}
EXPORT_SYMBOL(ib_find_gid_by_filter);
int ib_get_cached_pkey(struct ib_device *device,
u8 port_num,
int index,
......
......@@ -93,6 +93,14 @@ int ib_find_cached_gid_by_port(struct ib_device *device,
u8 port_num,
struct net_device *ndev,
u16 *index);
int ib_find_gid_by_filter(struct ib_device *device,
const union ib_gid *gid,
u8 port_num,
bool (*filter)(const union ib_gid *gid,
const struct ib_gid_attr *,
void *),
void *context, u16 *index);
/**
* ib_get_cached_pkey - Returns a cached PKey table entry
* @device: The device to query.
......
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